Patents by Inventor Winfried Graf
Winfried Graf has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20230392974Abstract: A method for operating a balance includes: (a) introducing an ion cloud into a weighing chamber to bring an electrostatic charge state of a weighing sample towards an electrostatic neutral state, (b) detecting the neutral state, and (c) acquiring measured values of a weighing sensor, calculating therefrom a final weighing value representing the electrostatic neutral state, and outputting the final weighing value. When the ionizer is activated, the measured values of the weighing sensor are acquired, preliminary weighing values are calculated from the measured values and the final weighing value is calculated and output after a number of preliminary weighing values have been recognized as stable. During a recognition phase, positive and negative ion clouds are alternatingly generated, and during a neutralization phase, only ion clouds of that sign are generated that, in the recognition phase, had led to the larger changes within the preliminary weighing values.Type: ApplicationFiled: August 23, 2023Publication date: December 7, 2023Inventors: Heinrich FELDOTTE, Heyko HOLST, Winfried GRAF, Olaf DUDDA
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Publication number: 20220404194Abstract: A gravimetric measuring device includes a weighing chamber with a vertical weighing chamber wall, which is formed as a support structure (14) with cover modules (28) detachably fixed thereto on the weighing chamber side, each cover module (28) having, on its weighing chamber side, a module front wall (30) covering the support structure (14) at least partially. The cover modules (28) have locking cantilevers (38) directed towards the support structure such that the locking cantilevers (38) are provided with vertically directed through-openings (40) which are aligned with corresponding through-openings (20, 22) of the support structure (14). The cover modules (28) are locked to the support structure (14) with locking rods (42) which pass through the mutually aligned through-openings (40; 20, 22) of the cover modules (28) and the support structure (14).Type: ApplicationFiled: August 19, 2022Publication date: December 22, 2022Inventors: Bettina EMMERMANN, Alexander BERGER, Reinhold FELDMANN, Winfried GRAF
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Patent number: 10976192Abstract: A positioning foot having a hydraulic shock absorber with a fluid-filled hollow cylinder (210), in which a piston (220) that moves axially between an advanced, spring prestressed position and a retracted position. The piston separates a front axial fluid space (214) and a rear axial fluid space (215) from one another in the hollow cylinder. Both fluid spaces are connected to one another in a fluid exchanging fashion via at least one throttle opening (223) in the piston. The piston is rigidly connected to a piston rod (221), which passes through the front fluid space and abuts a fixed stop (218) in the retracted position, in which the volume of the rear axial fluid space is minimized and the volume of the front axial fluid space is maximized. The spring prestress is dimensioned so that the weight of the device body moves the piston dampingly into the retracted position.Type: GrantFiled: March 27, 2019Date of Patent: April 13, 2021Assignee: SARTORIUS LAB INSTRUMENTS GMBH & CO., KGInventors: Winfried Graf, Malte Staender
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Publication number: 20190219440Abstract: A positioning foot having a hydraulic shock absorber with a fluid-filled hollow cylinder (210), in which a piston (220) that moves axially between an advanced, spring prestressed position and a retracted position. The piston separates a front axial fluid space (214) and a rear axial fluid space (215) from one another in the hollow cylinder. Both fluid spaces are connected to one another in a fluid exchanging fashion via at least one throttle opening (223) in the piston. The piston is rigidly connected to a piston rod (221), which passes through the front fluid space and abuts a fixed stop (218) in the retracted position, in which the volume of the rear axial fluid space is minimized and the volume of the front axial fluid space is maximized. The spring prestress is dimensioned so that the weight of the device body moves the piston dampingly into the retracted position.Type: ApplicationFiled: March 27, 2019Publication date: July 18, 2019Inventors: Winfried GRAF, Malte STAENDER
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Patent number: 10197435Abstract: A balance including a weighing chamber (16); a draft shield (23), which surrounds the weighing chamber; a climate module (34), which is detachably disposed in the weighing chamber; a processor (32), which is programmed to provide an evaporation rate correction value; a data input unit; and a data transmission path, over which data is exchanged between the climate module and the processor. Also disclosed are a climate module configured to electrically yet detachably couple to a balance, wherein the climate module forms a self-contained modular unit and includes various sensors (52, 54, 62) and a path over which data is transmitted to an external processor, and to a method for calibrating a pipette using a balance, wherein an evaporation rate is determined during the calibration process, and the measurement is corrected in accordance with the determined evaporation rate.Type: GrantFiled: May 9, 2016Date of Patent: February 5, 2019Assignee: SARTORIUS LAB INSTRUMENTS GMBH & CO. KGInventors: Winfried Graf, Christian Elo
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Patent number: 10036766Abstract: A method for producing a force-measuring element (10) having at least one articulation point (20) which separates one region of the force-measuring element (10) into two connected subregions (11, 12) which can be deflected in relation to one another. The method includes: providing a force-measuring element blank (10), removing material from the force-measuring element blank (10) in order to produce the articulation point (20), checking whether the deflection behavior of the subregions (11, 12) which is produced by the articulation point corresponds to a predefined specification, defining a correction form (30) which can be produced through material removal and compensates for an ascertained deviation from the predefined specification, correcting the articulation point geometry using a laser and the previously defined correction form (30), through material removal at the articulation point.Type: GrantFiled: January 29, 2016Date of Patent: July 31, 2018Assignee: Sartorius Lab Instruments GmbH & CO. KGInventors: Winfried Graf, Friedrich Helmsen, Detlev Erben, Helga Covic, Tanja Mueck
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Patent number: 9927284Abstract: A monolithic weighing system including a base (12), a load holder (26), which is articulated on the base (12) through a parallel link arrangement (16, 20), and a lever (28), which is articulated on the load holder (26) and which has an attachment point for a force compensating arrangement and a target area (32) for an optical position sensor (34). The target area (32) has a slotted diaphragm (36) in a thin walled lever section of the lever (28) in the deflection plane thereof. A position sensor pedestal (38a, b), which is integrally connected to the base (12), is arranged laterally adjacent to the target area (32). The position sensor pedestal has a pedestal aperture (40a, b), which extends perpendicularly to the deflection plane. The slotted diaphragm (36) of the target area (32) is laser-machined through the pedestal aperture (40a, b).Type: GrantFiled: October 16, 2015Date of Patent: March 27, 2018Assignee: Sartorius Lab Instruments GmbH & Co. KGInventor: Winfried Graf
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Publication number: 20160250628Abstract: A balance including a weighing chamber (16); a draft shield (23), which surrounds the weighing chamber; a climate module (34), which is detachably disposed in the weighing chamber; a processor (32), which is programmed to provide an evaporation rate correction value; a data input unit; and a data transmission path, over which data is exchanged between the climate module and the processor. Also disclosed are a climate module configured to electrically yet detachably couple to a balance, wherein the climate module forms a self-contained modular unit and includes various sensors (52, 54, 62) and a path over which data is transmitted to an external processor, and to a method for calibrating a pipette using a balance, wherein an evaporation rate is determined during the calibration process, and the measurement is corrected in accordance with the determined evaporation rate.Type: ApplicationFiled: May 9, 2016Publication date: September 1, 2016Inventors: Winfried GRAF, Christian ELO
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Publication number: 20160223591Abstract: A method for producing a force-measuring element (10) having at least one articulation point (20) which separates one region of the force-measuring element (10) into two connected subregions (11, 12) which can be deflected in relation to one another. The method includes: providing a force-measuring element blank (10), removing material from the force-measuring element blank (10) in order to produce the articulation point (20), checking whether the deflection behavior of the subregions (11, 12) which is produced by the articulation point corresponds to a predefined specification, defining a correction form (30) which can be produced through material removal and compensates for an ascertained deviation from the predefined specification, correcting the articulation point geometry using a laser and the previously defined correction form (30), through material removal at the articulation point.Type: ApplicationFiled: January 29, 2016Publication date: August 4, 2016Inventors: Winfried GRAF, Friedrich HELMSEN, Detlev ERBEN, Helga COVIC, Tanja MUECK
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Patent number: 9383252Abstract: A precision balance provided with a windshield having at least one wall element (2, 10, 12, 20, 24), which is provided with an electrically conductive coating (62), and having an electrical connection (66) for the coating. An electrical test device (68) is additionally provided, which is integrated into the precision balance and with which it is possible to check whether the coating (62) is connected to the electrical connection (66).Type: GrantFiled: September 17, 2013Date of Patent: July 5, 2016Assignee: Sartorius Lab Instruments GmbH & Co. KGInventors: Heinrich Feldotte, Winfried Graf, Heyko Holst, Christian Schrader
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Publication number: 20160033320Abstract: A monolithic weighing system including a base (12), a load holder (26), which is articulated on the base (12) through a parallel link arrangement (16, 20), and a lever (28), which is articulated on the load holder (26) and which has an attachment point for a force compensating arrangement and a target area (32) for an optical position sensor (34). The target area (32) has a slotted diaphragm (36) in a thin walled lever section of the lever (28) in the deflection plane thereof. A position sensor pedestal (38a, b), which is integrally connected to the base (12), is arranged laterally adjacent to the target area (32). The position sensor pedestal has a pedestal aperture (40a, b), which extends perpendicularly to the deflection plane. The slotted diaphragm (36) of the target area (32) is laser-machined through the pedestal aperture (40a, b).Type: ApplicationFiled: October 16, 2015Publication date: February 4, 2016Inventor: Winfried GRAF
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Publication number: 20140014416Abstract: A precision balance provided with a windshield having at least one wall element (2, 10, 12, 20, 24), which is provided with an electrically conductive coating (62), and having an electrical connection (66) for the coating. An electrical test device (68) is additionally provided, which is integrated into the precision balance and with which it is possible to check whether the coating (62) is connected to the electrical connection (66).Type: ApplicationFiled: September 17, 2013Publication date: January 16, 2014Applicant: Sartorius Lab Instruments GMBH & CO. KGInventors: Heinrich FELDOTTE, Winfried GRAF, Heyko HOLST, Christian SCHRADER
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Publication number: 20130292193Abstract: A work booth (22) having a work chamber (20) and an integrated scale (10) that includes a load carrier (12) which is arranged in the work chamber (20) of the work booth (22), a weighing system (14) which is arranged outside the work chamber of the work booth (22), and a coupling element (16) which connects the load carrier (12) to the weighing system (14). The work chamber (20) of the work booth (22) has a ventilation opening (28), through which air can be extracted from the work chamber (20) of the work booth (22).Type: ApplicationFiled: July 10, 2013Publication date: November 7, 2013Inventors: Winfried GRAF, Michael LAUBSTEIN, Jan VON STEUBEN, Thomas PERTSCH, Dirk AHLBRECHT, Christian SCHRADER
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Patent number: 7964806Abstract: An electronic scale having a measuring sensor (1 . . . 16), a digital signal processing unit (18), a digital display (19), a bubble level (20), which includes a container (21) that is partially filled with a liquid (22) while forming a gas bubble (23), and circuit component or program routine in the digital signal processing unit (18) for detecting a displacement of the gas bubble (23). An additional circuit component or program routine detects the diameter of the gas bubble (23). The diameter of the gas bubble changes due to vertical vibrations of the scale. The signal from the measuring sensor (1 . . . 16) falsified by vibrations can thus be corrected by the digital signal processing unit (18) by calculation, making use of the diameter signal.Type: GrantFiled: June 12, 2009Date of Patent: June 21, 2011Assignee: Sartorius AGInventors: Gerd Freydank, Winfried Graf, Christian Oldendorf
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Patent number: 7906737Abstract: An electronic scale having a measuring sensor (1 . . . 16), a digital signal processing unit (18), a digital display (19) and an inclinometer (40). The inclinometer derives a signal for the tilt of the scale from the difference of at least two signals. The digital signal processing unit (18) is provided with an additional circuit component or program routine that adds the two signals and, by way of this cumulative signal, corrects the vibration-distorted signal of the measuring sensor (1 . . . 16). A plurality of inclinometers enables the simultaneous detection of momentary gravitational acceleration. For example, in an electric bubble level, the gas bubble moves out of place when tilted and the diameter of the gas bubble changes when the gravitational acceleration changes. The scale thus provides an additional signal for correcting the influence of disturbances with minimum complexity.Type: GrantFiled: June 12, 2009Date of Patent: March 15, 2011Assignee: Sartorius AGInventors: Gerd Freydank, Winfried Graf, Christian Oldendorf
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Publication number: 20090301790Abstract: An electronic scale having a measuring sensor (1 . . . 16), a digital signal processing unit (18), a digital display (19), a bubble level (20), which includes a container (21) that is partially filled with a liquid (22) while forming a gas bubble (23), and circuit component or program routine in the digital signal processing unit (18) for detecting a displacement of the gas bubble (23). An additional circuit component or program routine detects the diameter of the gas bubble (23). The diameter of the gas bubble changes due to vertical vibrations of the scale. The signal from the measuring sensor (1 . . . 16) falsified by vibrations can thus be corrected by the digital signal processing unit (18) by calculation, making use of the diameter signal.Type: ApplicationFiled: June 12, 2009Publication date: December 10, 2009Applicant: Sartorius AGInventors: Gerd FREYDANK, Winfried GRAF, Christian OLDENDORF
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Publication number: 20090242279Abstract: An electronic scale having a measuring sensor (1 . . . 16), a digital signal processing unit (18), a digital display (19) and an inclinometer (40). The inclinometer derives a signal for the tilt of the scale from the difference of at least two signals. The digital signal processing unit (18) is provided with an additional circuit component or program routine that adds the two signals and, by way of this cumulative signal, corrects the vibration-distorted signal of the measuring sensor (1 . . . 16). A plurality of inclinometers enables the simultaneous detection of momentary gravitational acceleration. For example, in an electric bubble level, the gas bubble moves out of place when tilted and the diameter of the gas bubble changes when the gravitational acceleration changes. The scale thus provides an additional signal for correcting the influence of disturbances with minimum complexity.Type: ApplicationFiled: June 12, 2009Publication date: October 1, 2009Applicant: Sartorius AGInventors: Gerd FREYDANK, Winfried Graf, Christian Oldendorf
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Patent number: 6809911Abstract: The present invention relates to a safety switching device for safely switching off an electrical load such as an electrically driven machine. The safety switching device has a failsafe disconnection unit and a non-failsafe signaling unit, both of which are supplied with an external control signal. The disconnection unit fail-safely switches off the electrical load as a function of the control signal but with a first delay. The signaling unit produces an external reporting signal as a function of the control signal in a non-delayed and non-failsafe manner.Type: GrantFiled: January 31, 2003Date of Patent: October 26, 2004Assignee: Pilz GmbH & Co.Inventors: Rolf Dickhoff, Winfried Gräf
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Patent number: 6777830Abstract: A safety lock out switch system for the prevention of an unexpected restart of an electrically powered machine in whose main power circuit it is installed. Therein the power-free status of the power supply output of the system is confirmed visually. The system is configured so it is flexible, thus being able to be used in the most various types or sizes of machines. Technical aspects and safety aspects were taken into account therein so that the installation can be carried out in practically every country in the world.Type: GrantFiled: March 6, 2002Date of Patent: August 17, 2004Assignees: Pilz GmbH & Company, Moeller GmbHInventors: William Edward Anderson, Donald Louis Wires, Jürgen Behrens, Claude Hovine, Gernot Müsseler, Rolf Dickhoff, Winfried Gräf, Udo Ratey
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Publication number: 20030137788Abstract: The present invention relates to a safety switching device for safely switching off an electrical load such as an electrically driven machine. The safety switching device has a failsafe disconnection unit and a non-failsafe signaling unit, both of which are supplied with an external control signal. The disconnection unit fail-safely switches off the electrical load as a function of the control signal but with a first delay. The signaling unit produces an external reporting signal as a function of the control signal in a non-delayed and non-failsafe manner.Type: ApplicationFiled: January 31, 2003Publication date: July 24, 2003Inventors: Rolf Dickhoff, Winfried Graf